Geometrical analysis of precessional switching

In this paper we present a magnetization switching in magnetic particles and films. It is one of the fundamental issues in spin dynamics studies due to its relevance in magnetic recording and data storage technology. In this area it has been recently recognized the potential convenience of realizing the switching of magnetization in particles and film by means of precessional motion of magnetization. In the typical precessional switching process the magnetization is initially along the easy axis of the body and the external magnetic field is approximately orthogonal to the easy axis. If the field is strong enough and applied for a sufficiently long time, the magnetization can be reversed. We will study this process by using the Landau-Lifshitz-Gilbert (LLG) equation.